{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "data breach", "arguments": ["purpose", "attacker", "time", "number of victim", "damage amount", "number of data", "attack pattern", "victim", "tool"]}], "input": "GREENFIELD — Hancock Health fell victim to a cyber attack Thursday , with a hacker demanding Bitcoin to relinquish control of part of the hospital ’s computer system ."}
{"data breach": []}